Curved large diameter snorkel specially designed for Spearfishing with a polymer structure can be modified by copolymerizing chloroprene with sulfur and/or 2, 3 dichloro 1, 3-butadiene to yield a family of materials with a broad range of chemical and physical properties. By proper selection and formulation of these polymers, the compounder can achieve optimum performance for a given end-use. Neoprene is available as a solid and as a liquid dispersion. Neoprene mouthpiece, Classical shape.